Development of a High Energy Ion and Electron Beam Calibration System for Space Plasma Analyzers

Details Development of a High Energy Ion and Electron Beam Calibration System for Space Plasma Analyzers Development of a High Energy Ion and Electron Beam Calibration System for Space Plasma Analyzers

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm43c1546f&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM43C-1546

Physics

7894 Instruments And Techniques

Scientific paper

It has increasingly become important to have space plasma mass analyzers which can measure 3-dimensinal velocity distributions with wide energy range and fine time and space resolution for comprehensive understanding of space environment surrounding the Earth. A reliable calibration facility capable of simulating variety of space plasma flows is necessary to develop such analyzers. A new system is being developed for calibration of space plasma instruments that uses ion and electron beam of energy range of 5 keV to 150 keV in Plasma and Space Science Center, National Cheng Kung University. The system consists of ion and electron source, ExB mass spectrometer, beam expander, beam accelerator, drift tube and 3-axis turntable in the main chamber. Neutral gas such as N2, O, He, and H2 is introduced to ion source and ionized by an electron gun, then accelerated to an energy of 10 keV/charge and passed to mass spectrometer. The mass spectrometer has a 90 degree crossed electric and magnetic field to select desired mass species. Ion or electron beam is expanded by means of electric field oscillation, 2 set of meshed electrodes, and lends electric field, then accelerated to up to 150keV by potential drop in accelerator tube. Drift tube has two position adjustable slits and a 2-dimentional-beam profile monitor. In the main chamber 3-axis turntable is set. We will discuss the design and progress of the system

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